Package edu.cornell.mannlib.vitro.webapp.modelaccess.impl

Class RequestModelAccessImpl

  • All Implemented Interfaces:
    RequestModelAccess
    public class RequestModelAccessImpl
extends Object
implements RequestModelAccess
    For each category of data structure, the pattern is the same: Build a key from the supplied options. If the cache contains a structure with that key, return it. Otherwise, create the requested structure, often from a simplified version. For example, if the request was for a LANGUAGE_AWARE RDFService, get the LANGUAGE_NEUTRAL RDFService and wrap it with langauge awareness. This second step is a recursive call, so we check again to see if the cache contains the new requested structure based on a modified key. If it does contain the structure, use it. Otherwise, create it. Eventually, we reach a request for the simplest structure, which we fetch from the ShortTermDataStructuresFactory. If the request includes language-awareness, the structure can be created from the language-neutral version. If language-awareness is disabled, the language-neutral structure will be cached under two different keys. ---------------------------------------- There are two hacks here to support model switching: one in the OntModels and one in the WebappDaoFactories. These are hacks for several reasons, not the least of which is that the model switching will not be available on WebappDaoFactories based on ASSERTIONS_ONLY or INFERENCES_ONLY, and similarly for the OntModel.